I had Peak oil in my LS400 and S2000 a couple years ago from Pep Boys FAR. Those engines seems to run quieter with Peak oil than Havoline and Chevron Supreme, may be because Peak oil seems to be a little thinner. Peak oil was in LS400 for full OCI of 6-7k miles without problem.

This oil is bottled by Warren Performance out of Nebraska for "Old World Industries". On the bottom of the quart container you'll find a WPP or a WNE for Warren, Nebraska.

IMO...same oil as SuperTech at WM and the Warren brand...Mag1.

I bought a case of this oil, on clearance, at Strauss Auto Parts for $1.79 a quart in SN, GF-5. I bought a 50/50 mixed case of 5W-30 and 5W-20 quarts.....for blending with other oils. (I bought 14 quarts so I could get over the threshold of $25.00 in order to use the $5 off coupon) The actual price per quart was $1.43 for 14 quarts of oil.

IMO...this is good serviceable oil for the price and you can run it, depending on your engine, for 5K to 6K with confidence.

When I get back home to Coney Island, later this month, I'll be using this oil, as well as many other clearance oils from Kmart and stash oils for "a whole Lotta" oil changes for neighbors, family and friends vehicles. This oil should blend well with all name brand oils and store brand oils. After all....it's compatible with all synthetic and conventional oils. It says so right on the container!!!

But for now.....I'm enjoying Florida.

Edited by mongo161 (10/02/1106:10 PM)

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I get by with a little help from my friends....listen with your eyes....it's the ONLY way to believe what you hear...

I've been using the PEAK 5W30 oil on/off in my daughters '06 Mazda3 for sometime. This was the FAR from PB's with ProLine filters that I bought in Sept'09. I did alternate the OIC's a bit with other oils such as Havoline DS, Castrol GTX, VWB and others. I thought I had used up all of the PEAK! I did just use it up 2 weeks ago when I changed her oil/filter and ATF(Castrol IMV). Her MPG jumped right away.

Also, this is the 3rd ATF change since she took ownership of the car. The selling dealer did it prior to sale and I have now done it twice. ATF ~ every 20K miles as she uses this car for her job.

What I notice with the PEAK 5W30 in her mazda3 2.0L is that the engine is smoother/quieter(or at least as good as) than other oils that I have used in the 2 years that she has owned the car...No Lie! Also, the MPG is often better during the OCI. She is always near the 36 MPG regularly as compared to 33 MPG with other oils, even 5W20(the required oil). I like the 5W30's in this engine for those reasons alone and the PEAK seems as good as any oil that I have used thus far.

We do ~4800-5000 mile OCI's and I typically change the oil when it's convienent so, it's often ~4000 mile OCI's. But, I really like this PEAK 5W30 in her engine. She is putting on ~20K miles/year since she got the car so, OCI's and general PM's are very important to me as she lives out of town but often visits for a weekend.

I did just use it up 2 weeks ago when I changed her oil/filter and ATF(Castrol IMV).

Interesting choice in ATF. I've got 2 Mazda's with automatic transmissions. They both call for Mazda M-V fluid (not the same as Mercon V) and I've looked around for what is compatible. Thinking about Redline D4. Currently just been buying the Mazda M-V from the dealership for drain/refills. On the Castrol website IMV is not listed as compatible. Is it on the bottle?

I did just use it up 2 weeks ago when I changed her oil/filter and ATF(Castrol IMV).

Interesting choice in ATF. I've got 2 Mazda's with automatic transmissions. They both call for Mazda M-V fluid (not the same as Mercon V) and I've looked around for what is compatible. Thinking about Redline D4. Currently just been buying the Mazda M-V from the dealership for drain/refills. On the Castrol website IMV is not listed as compatible. Is it on the bottle?

I'll have to look/see. All I know, it that it works great!Went to different forums and many Mazda3 owners are using Castrol IMV and Mercon V as well with great success.Been using IMV since 50+K miles and now has 84K miles. Shifts really smooth and very responsive. Real nice drivetrain.